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Apparatus and method for identifying atrial arrhythmia by far-field sensing

  • US 9,138,589 B2
  • Filed: 04/04/2014
  • Issued: 09/22/2015
  • Est. Priority Date: 11/21/2001
  • Status: Expired due to Term
First Claim
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1. A method of identifying atrial fibrillation in an implantable defibrillator comprising:

  • capturing cardiac signals from electrodes disposed beneath the skin and outside of a patient'"'"'s ribcage;

    identifying R-waves in the cardiac signals and observing whether intervals between R-waves are stable or irregular;

    if the R-wave intervals are irregular, observing whether QRS morphology is similar on a beat-to-beat basis; and

    if R-wave intervals are irregular and QRS morphology is similar on a beat-to-beat basis, determining that the patient is experiencing atrial fibrillation.

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